bash 如何从 $SSH_CLIENT 获取 IP 地址
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How to get the IP address from $SSH_CLIENT
提问by prosseek
$SSH_CLIENT has IP address with some port info, and echo $SSH_CLIENT gives me '10.0.40.177 52335 22', and Running
$SSH_CLIENT 有一些端口信息的 IP 地址，echo $SSH_CLIENT 给我'10.0.40.177 52335 22'，然后运行
if [ -n "$SSH_CONNECTION" ] ;
then
for i in $SSH_CLIENT
do
echo $i
done
fi
if [ -n "$SSH_CONNECTION" ] ;
then
for i in $SSH_CLIENT
do
echo $i
done
fi
gives me
给我
- 10.0.40.177
- 52335
- 22
- 10.0.40.177
- 52335
- 22
And I see the first element is the IP address.
我看到第一个元素是 IP 地址。
Q : How can I get the first element of $SSH_CLIENT? ${SSH_CLIENT[0]} doesn't work.
问：如何获取 $SSH_CLIENT 的第一个元素？${SSH_CLIENT[0]} 不起作用。
回答by Ignacio Vazquez-Abrams
sshvars=($SSH_CLIENT)
echo "${sshvars[0]}"
or:
或者：
echo "${SSH_CLIENT%% *}"
回答by ghostdog74
you can use set --eg
你可以使用set --例如
$ SSH_CLIENT="10.0.40.177 52335 22"
$ set -- $SSH_CLIENT
$ echo # first "element"
10.0.40.177
$ echo # second "element"
52335
$ echo
22
回答by Emil
For strings, as is the case here, the <<<operator may be used:
对于字符串，就像这里的情况一样，<<<可以使用运算符：
$ read ipaddress outport inport <<< $SSH_CLIENT
See e.g: Linux Bash: Multiple variable assignment. Don't do this with binary input though: Is there a binary safe <<< in bash?
参见例如：Linux Bash：多变量赋值。但是不要用二进制输入来做这个：bash 中是否有二进制安全<<<？
回答by vineetv2821993
You can get it programmatic way via ssh library (https://code.google.com/p/sshxcute)
您可以通过 ssh 库（https://code.google.com/p/sshxcute）以编程方式获取它
public static String getIpAddress() throws TaskExecFailException{
ConnBean cb = new ConnBean(host, username, password);
SSHExec ssh = SSHExec.getInstance(cb);
ssh.connect();
CustomTask sampleTask = new ExecCommand("echo \"${SSH_CLIENT%% *}\"");
String Result = ssh.exec(sampleTask).sysout;
ssh.disconnect();
return Result;
}
回答by bayuah
If you prefer awk:
如果你喜欢awk：
$ SSH_CLIENT="10.0.40.177 52335 22"
$ echo $SSH_CLIENT|awk '{print }' # first element
10.0.40.177
$ echo $SSH_CLIENT|awk '{print }' # second element
52335
$ echo $SSH_CLIENT|awk '{print }' # third element
22
回答by Howard
I use this in my .bash_profile, and it works beautifully.
我在我的 .bash_profile 中使用了它，它运行良好。
if [ -n "$SSH_CONNECTION" ] ;
then
echo $SSH_CLIENT | awk '{print }'
fi
